Overview
Fortified Mail IV is part of the Academy battle branch. Each row below is one research level, including its cost, time, power and resulting effect.
Level costs
| Level | Bread | Wood | Stone | Iron | Gold |
|---|---|---|---|---|---|
| 1 | 490,000 | 490,000 | 99,000 | 24,000 | 6,400 |
| 2 | 590,000 | 590,000 | 110,000 | 29,000 | 7,600 |
| 3 | 690,000 | 690,000 | 130,000 | 34,000 | 8,900 |
| 4 | 890,000 | 890,000 | 170,000 | 44,000 | 11,000 |
| 5 | 1,800,000 | 1,800,000 | 360,000 | 91,000 | 23,000 |
Requirements and results
| Level | Prerequisites | Time | Power | Effect |
|---|---|---|---|---|
| 1 | Academy Lv. 22, Lance Upgrade IV Lv. 1 | 8h 53m | 9,600 | 4% cavalry health |
| 2 | Academy Lv. 23, cavalry armor iv Lv. 1 | 11h 33m | 9,600 | 4% cavalry health |
| 3 | Academy Lv. 24, cavalry armor iv Lv. 2 | 17h 46m | 9,600 | 4% cavalry health |
| 4 | Academy Lv. 25, cavalry armor iv Lv. 3 | 1d 2h 40m | 9,600 | 4% cavalry health |
| 5 | cavalry armor iv Lv. 4 | 2d 18h 40m | 15,600 | 6.5% cavalry health |